The course focuses on the causes of technical risks associated with continued operation of construction. Students will be familiar with factors that can affect the quality and reliability of building structures, respectively. with the repair, maintenance, the decision to demolish. Introduction to testing of structures (in testing, in situ). Classes will be supplemented by practical demonstrations of testing, preparation of sampling plan design and ensure its representativeness using a simple tool qualification quantifying the risks and hazards - based on the assumption of minimizing systematic errors of the survey. Attention to the most common mistakes contractors and their prevention. Interpretation into account the ecological and aesthetic function reconstruction and repair and in particular to protect the completed works against negative environmental influences.